L-theanine is able to cross the blood-brain barrier and may promote relaxation while balancing stress levels. A structural analog to the excitatory neurotransmitter glutamate, theanine has been shown to promote alpha wave production in the brain and increase brain dopamine levels. Melatonin, naturally synthesized in the pineal gland and gastrointestinal tract, is involved in regulating the body’s sleep cycle. Finally, lemon balm has calming properties that may support healthy management of stress and anxiety.